\begin{tikzpicture} [every node/.style={anchor=south,,inner sep=0,fill=white}]
	\node [drop shadow] at (5em,0) (SYNBL){
		\begin{tabular}{|C{4em}|C{4em}|}
			\hline
			单词 & 编码\\ 
			\hline
			program & 3 \\ 
			\hline
			procedure & 4 \\ 
			\hline
			begin & 5 \\ 
			\hline
			end & 6 \\
			\hline
			while & 7 \\
			\hline
			do & 8 \\
			\hline
			+ & 9 \\
			\hline
			* & 10 \\
			\hline
			: & 11 \\
			\hline
			:= & 12 \\
			\hline
			= & 13 \\
			\hline
			, & 14 \\
			\hline
			; & 15 \\          
			\hline
	\end{tabular}};	
\end{tikzpicture}